Truck



M. P. HOLMES. 1

TRUCK.

APPLICATION FILED OCT-3,1917.

Patented June 1, 1929.

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UMTED stares Parser QE'FECEQI.

lvionnrsr. HoLM sor LAR MO T, NEW'HAMPSI-IIRE, asslc von '10 sULLIv iv MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

TRUCK.

To all whom it may concern: Y

'Be it known that I, MORRIS P. HOLMES, a citizen of the United'States, residing at Claremont, in the county of Sullivanand State of New Hampshire, have 'inventet certain new and useful Improvements in Trucks, of which the'following isa full,

and exact specification. I

My invention relatesto trucks. 7 It has for its object to provide an improved braking mechanism for trucks or the like whereby upon the'rupture or accidental certain of the driving elethe brakes are auto- 'matically applied. A further object of my invention is to provide an improved braking mechanism especially'adapted to use in connection with power. driventrucks of the disconnection of ments of the truck,

type used with mining machines, the braking mechanism-being adapted to act automatically in an emergency to apply the brakes to the truck and thereby arrest movement of the truck and the heavy mining machine carried thereon in such a manner as to prevent accidents which might otherwiseoccur should such a heavy equipment run wild on the steep grades encountered in manymines. These and other objects' and advantages of vmy improved construction will, however, hereinafter more fully appear. In the accompanying drawings, I have shown for purposes of illustration two embodiments which my invention may assume in practice, illustrating the same as applied to a mining machine truck of standard form.' In these drawings,- Figure 1 is a lan view 'of; a truck equipped with one Fig. 2 is a side elevation of the truck shown in Fig. 1, with a mining machine thereon:

Fig. 3 is "equipped vention shown inFigs landffz.

Fig.4: is aplan view of-a portion'of the truck shown'in Fig. '8.

a side elevation of a truck In this illustrative construction, it will be noted thatI have shown a mining machine truck of usua form. including a frame havingthei'eon theusualmachine guiding surfaces 1' and mounted'on" front and rear wheels 2 and 3 adapted to, engage with the track 1 and operatively connected, as shown the chain connection 5..

form of my improvement.-

with a modified' 'form of" the 'in- 'wheels 2 and:

through suitable driving connections 5 and 6, hereln shown in the form of flexible cha n and sprocket connections, with a I reamed June 1,1920. Application filed October 3, 1917. Serial No. 194,597;

power shaft 7 preferably disposed atthe l rear of the truck. 'As shown, this shaft 7 is operatively connectible with the mining machine through suitable gearing 8, itself connected to a'gear'9 which is in turn en- I "gageable with a suitable'gear, as for in "stance the gear indicated at 10, forming one of the moving parts of a motor driven mining machine 11 of well known construction.

Thus, as in the usual construction, when the motor of the mining machine 11 is operated to rotate the gear 10, the rotation of the latter will'be imparted through the gear 9 to the shaft 7, and the rotation 'ofthe latter jwill'be thus imparted tothe wheels 2 and 3 to propel the truck. thatI have hereinshown brake andclutch mechanism 12'operatively disposed at one end of the shaft"? and controlled by a single lever 13, the same being adapted to use in the control of the truck in a well known manner, and not being specifically. described, as the construction of'this mechanism is old and well known. a V 1 In'my improvement, it' will be observed that I have provided at one side of the truck and inside the chain connection ,5,a 'rearwardly disposed .member .14 pivotally. mounted at its'front end at'15' on the truck at a point in rear of the wheels 2, and hav- It-will also be noted ing a rear weighted portion 16,,preferably also provided with a roller 17, which is in turn adapted to rest upon the lowerrun of It will also be noted that this member 1a is fixed to a cross shaft 18 suitably journaled in the frame, and that this shaft is also fixed at its opposite ends to short, vertically disposed members i or cranks 19, in turn pivotally connected to brake shoes 20 engageable with the rear surface of 'the wheels 2. served thatvwhen the tween the shaft .7 and disconnected, as 5 becomes detached, the weight of the memthe wheels 2 becomes for instancewhen the chain Thus, it will be: obdriving connection bep ber i l-will cause the same todrop down about its pivot 15 and 18 and swing the cranks 19. to the rightin sucha manner asto bring the brake. shoes 20 into frictional engagement 7 with the thus rock the shaft thus automatically arrest 1;

movement of the truck when the hand controlled braking mechanism 12 controlled by the lever 13 is inoperative.

In the form' of my invention 'shownin Figs. 8 and i, it will be noted that the member 14 is pivoted at 21 at a point between the wheels 2 and 3, and elongated,'and itself provided with an intermediate arcuate or brake shoe portion 22 adapted to engage the upper portion of the wheel 2, the separate brake shoe being thus rendered unnecessary. It will also be noted that in this construction a supplemental member 23 is pro vided, which is pivotally connected to the frame at 24 at a point in front of the wheel 3 and is pivotally connected at 25 to the member 14 at a point to the rear of its pivot 21, this member 22 likewise being provided with an arcuate or brake shoe portion 26 adapted to engage the upper surface of the wheel 3. Due to this construction, it will be observed that when the member 14 is permittedto drop down, as for instancewhen the chain 5 is broken or becomes detached for any reason, the weight of the member 14 will cause the portion 22 thereof to engage the wheel 2 frictionally and, at the same time, will cause the rear end of the member 23 to be depressed in such a'manner as to bring the portion 26 thereof into frictional engagement with the wheel 3.

In the use of my improvement, it will be observed that no matter when the driving 7 connection 5 may break, the wheels 2 and 3 are automaticallyretarded, the automatic braking mechanism acting instantaneously to apply the brakes either to the two rear wheels, as shown in the construction illustrated in Figs. 1 and 2, or to the two wheels at one side of the truck, as in the constructionfillustrated in Figs. -3 and 4, the

' effect being such that regardless of the grade on which the truck may be moved, all danger of the truck and its heavy machine running wild in the mine is effectively prevented. It will also be observed that the construction shown is exceedingly simple in form and adapted to be applied without difiiculty to a truck of standard construction, and that during thenormal'operation of the same, the mechanism in no way interferes with the ordinary driving mechanism, the latter being, as usual, controlled through the clutch and brake mechanism 12 which is in turn controlled through the controlling lever 13. 7 These and other advantages of my improved construction will, however, be

I clearly apparent to those skilled in the art,

While I have in this application specifically described two embodiments which my invention may assume in practice, it will be unde'rstoodthat' these forms of the same are shown for purposes of illustration and that the samemay be modified and embodied in various other forms without departing from nism to retard truck the spirit of the invention, it being my inv tention to includev all such modifications withinthe scope of the appended claims.

WVhat I claim as new and desire-t0 secure by Letters Patent is:

. 1. In a truck, truck driving mechanism, and a retarding means pivotally mounted V on a part of said truck and partially supported by said mechanism, automatically operative upon disconnection of said driving mechanism to retard truck movement.

2. In a truck, truck driving mechanism, and weight controlled retarding means held in an inoperative position by said mechanism and automatically operative upon disconnection of said driving mechanism to 7 retard truck movement.

3 .In a truck, truck driving mechanism, and normally inoperative means including a pivoted operating lever normally held in an inoperative position by a part of said mechanism 7 and automatically operative upon disconnection of said driving mecha- V movement. c

4. In combination, a wheeled truck, a mining machine thereon, driving'connections between said mining machine and the truck wheels, and braking mecanism pivot ally mounted on a part of said truckand held in an inoperative position by a part of said driving'connections and automatically operative upon rupture of said driving connections. f V r 5. In combination, a wheeled truck, a mining machine thereon, driving connections between said mining machine and the truck wheels including a flexible element, and braking mechanismpivotally mounted on a part'of said truck and held in aninoperative position by a part of. saiddriving connections and automatically operative upon rupture of said flexible element.

6. In a truck, truck' driving mechanism, controlling mechanism therefor, and automatically acting retarding means mounted lln partially on the truck and partially on the I driving mechanism and independent of said controlling means for automatically retard ing truck movement upon disconnection of said driving mechanism.

7. In a truck, truck driving mechanism controlling mechanism therefor, and automatically acting normally inoperative means responsive solely to gravity and independ-' ent of said controlling means for .automati-.

matically acting normally inoperative means normally engagingsaid driving mechanism and independent of said controll ng means for automatically retarding truck movement uponf disconnection of said driving mechamsm. V

.nections. between 9. In combination, a Wheeledtruck, a mining machine thereon, driving connections between said mining machine and the truclr wheels, means for controlling the movement'of said truck, and supplemental automatically acting means including a Weighted lever partially supported by the truck driving mechanism for retarding movement of the truck upon disconnection of said driving mechanism.

10. In atruck, truck driving mechanism, and normally inoperative means including a pivoted operating lever and operative conthe same and the truck wheels automatically operative upon cisconnection of said driving mechanism to retard truck movement.

11. In a truck, truck driving mechanism including 'a flexible driving connection, a pivoted member engageable therewith and normally resting thereon, and braking mechanism operatively connectedito said member and automatically actuated thereby upon rupture of said driving connection.

12. In a truck, truck driving mechanism including a flexible driving connection, a pivoted member engageable therewith and normally resting thereon, and braking mechanism operatively connected between said member and a plurality of the truck wheels and automatically actuated by said member upon rupture of said driving connection. V

13. In a truck, truck driving mechanism including a driving connection, a lever p1v-' oted on said truck and having a weighted free end, a roller carried on said lever and normally resting on one of the runs of said connections, and a brake disposed at the opposite end of said lever and engageable with a truck wheel upon rupture of said connection.

14. In a truck, truck driving mechanism including a driving connection, a pivoted member engageable therewith and normally resting thereon, and braking mechanism operatively connectedto said member and automatically actuated thereby upon rupture of said driving connection, said braking mechanism includinga crank and a pivotally connected braking member engageable with a truck wheel.

15. In a truck,-truck driving mechanism, and a plurality, of connected braking elements pivotally mounted on said truck and normally held inoperative by the driving mechanism. I

16. In a truck, truck driving mechanism,

a plurality of connected braking elements pivotally mounted on said truck and normally held inoperative by the driving mechanism, and a single weight attached to one of said elements and tending to renderthe elements operative.

, 17. In a truck, truck driving mechanism including a flexible driving connection, a

plurality of braking levers pivotally mounted on said truck, one of said levers-having a free end, a roller on saidfre'e end' and normally resting on the flexible connection, and brakes disposed on gageable with truclrwheels upon rupture of said connection. 7

. 18. In a truck, truck driving Y r vers and engageable with truck wheels upon rupture of said connection.

19. In a truck, truck driving mechanism, a braking lever pivotally mounted on said truck and engaging said mechanism, and a second braking lever pivotally mountedon the truck and operatively connected with the first lever.

20. In atruck, truck on said truck and engaging said mechanism, and a second braking lever pivotally mounted on the truck and'operatively connected with the first lever.

21. In a truck, truck driving mechanism, a braking lever pivotally mounted on said truck and engaging said mechanism, and a second braking lever pivotally mounted on the truck and operatively connected with the first lever, said braking levers being automatically operative to retard the motion of the truck upon disconnection of said driving mechanism.

22. In a truck, a driving wheel, transmission mechanism connected thereto, and re-. tarding mechanism controlled by said trans mission mechanism and automatically operated ,upon disconnection ofthelatterto otally mounted on said truck and normally held inoperative by the transmissionmechamsm.

26. In combination, a truck, a mining machine thereon, truck driving transmission mechanism on said truck driven by said mining machine, and braking means auto said. levers and .en-

driving mechanism,- a weighted braking lever pivotally mounted sion mechanism connected thereto, and a p plurality of connected braking elements pivmatically operative to retard the truck upon a break in said transmission mechanism.

' 27(In combination, a truck. a mining 'rnachlne thereon, truck driving transmission mechanism 011 vsaid truck driven by. said -mining machine whereby 'the latter may drive the former, and a brake forthe truck normally held out of operation by the transmission mechanism.

and braking means automatically operative to retard the truckupon breakage of said chain.

, MORRIS P. HOLMES,

r a a a 15 In testimony whereof I afiix'my signature. 

